EdkCompatibilityPkg/Foundation/Cpu/Pentium/CpuIA32Lib/EfiCpuVersion.c

   1 /*++
   2
   3 Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   EfiCpuVersion.c
  15
  16 Abstract:
  17
  18   Provide cpu version extract considering extended family & model ID.
  19 --*/
  20
  21 #include "CpuIA32.h"
  22
  23 VOID
  24 EFIAPI
  25 EfiCpuVersion (
  26   IN  OUT UINT16  *FamilyId,    OPTIONAL
  27   IN  OUT UINT8   *Model,       OPTIONAL
  28   IN  OUT UINT8   *SteppingId,  OPTIONAL
  29   IN  OUT UINT8   *Processor    OPTIONAL
  30   )
  31 /*++
  32
  33 Routine Description:
  34   Extract CPU detail version infomation
  35
  36 Arguments:
  37   FamilyId   - FamilyId, including ExtendedFamilyId
  38   Model      - Model, including ExtendedModel
  39   SteppingId - SteppingId
  40   Processor  - Processor
  41
  42 --*/
  43 {
  44   EFI_CPUID_REGISTER Register;
  45   UINT8              TempFamilyId;
  46
  47   EfiCpuid (EFI_CPUID_VERSION_INFO, &Register);
  48
  49   if (SteppingId != NULL) {
  50     *SteppingId = (UINT8) (Register.RegEax & 0xF);
  51   }
  52
  53   if (Processor != NULL) {
  54     *Processor = (UINT8) ((Register.RegEax >> 12) & 0x3);
  55   }
  56
  57   if (Model != NULL || FamilyId != NULL) {
  58     TempFamilyId = (UINT8) ((Register.RegEax >> 8) & 0xF);
  59
  60     if (Model != NULL) {
  61       *Model = (UINT8) ((Register.RegEax >> 4) & 0xF);
  62       if (TempFamilyId == 0x6 || TempFamilyId == 0xF) {
  63         *Model = (UINT8) (*Model  | ((Register.RegEax >> 12) & 0xF0));
  64       }
  65     }
  66
  67     if (FamilyId != NULL) {
  68       *FamilyId = TempFamilyId;
  69       if (TempFamilyId == 0xF) {
  70         *FamilyId = (UINT8 ) (*FamilyId + (UINT16) ((Register.RegEax >> 20) & 0xFF));
  71       }
  72     }
  73   }
  74 }